PublishLicense.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Base / System / Security / RightsManagement / PublishLicense.cs / 1305600 / PublishLicense.cs
                        
                        
                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//  This class implements the UnsignedPublishLicense class 
//   this class is the first step in the RightsManagement publishing process
// 
// History:
//  06/01/2005: IgorBel :   Initial Implementation
//
//----------------------------------------------------------------------------- 

using System; 
using System.Collections; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.Diagnostics;
using System.Globalization;
using System.Windows;
using MS.Internal.Security.RightsManagement; 
using SecurityHelper=MS.Internal.WindowsBase.SecurityHelper;
 
// Disable message about unknown message numbers so as to allow the suppression 
// of PreSharp warnings (whose numbers are unknown to the compiler).
#pragma warning disable 1634, 1691 

namespace System.Security.RightsManagement
{
 
    /// 
    /// A Publish License is a list of rights, users, metadata, and other information that specifies how a specific user on 
    /// a specific computer is able to use the specified content. This Publish License must be signed by using the 
    /// UnisignedPublishLicense.Sign function. The resulting signed Publish License is given to a potential end user
    /// who must then request a Use License by calling the PublishLicense.AcquireUseLicense function. It is only the 
    /// Use License that allows an application to exercise the rights that have been granted.
    /// 
    /// 
    ///     Critical:    This class expose access to methods that eventually do one or more of the the following 
    ///             1. call into unmanaged code
    ///             2. affects state/data that will eventually cross over unmanaged code boundary 
    ///             3. Return some RM related information which is considered private 
    ///
    ///     TreatAsSafe: This attrbiute automatically applied to all public entry points. All the public entry points have 
    ///     Demands for RightsManagementPermission at entry to counter the possible attacks that do
    ///     not lead to the unamanged code directly(which is protected by another Demand there) but rather leave
    ///     some status/data behind which eventually might cross the unamanaged boundary.
    ///  
    [SecurityCritical(SecurityCriticalScope.Everything)]
    public class PublishLicense 
    { 
        /// 
        /// This constructor accepts a string representation of a Publish License, which is supposed to be proided by the 
        /// publisher of a document to tyhe consumer of a document.
        /// 
        public PublishLicense(string signedPublishLicense)
        { 
            SecurityHelper.DemandRightsManagementPermission();
 
            if (signedPublishLicense == null) 
            {
                throw new ArgumentNullException("signedPublishLicense"); 
            }

            _serializedPublishLicense = signedPublishLicense;
 
            /////////////////
            // parse out the Use License acquisition Url 
            ///////////////// 
            _useLicenseAcquisitionUriFromPublishLicense =
                    ClientSession.GetUseLicenseAcquisitionUriFromPublishLicense(_serializedPublishLicense); 

            if (_useLicenseAcquisitionUriFromPublishLicense == null)
            {
                throw new RightsManagementException(RightsManagementFailureCode.InvalidLicense); 
            }
 
 
            /////////////////
            // parse out the Content Id GUID 
            /////////////////
            String contentIdStr = ClientSession.GetContentIdFromPublishLicense(_serializedPublishLicense);

            if (contentIdStr == null) 
            {
                throw new RightsManagementException(RightsManagementFailureCode.InvalidLicense); 
            } 
            else
            { 
                _contentId = new Guid(contentIdStr);
            }

            ///////////////// 
            // parse out the Referral Info
            ///////////////// 
            ClientSession.GetReferralInfoFromPublishLicense( 
                            _serializedPublishLicense,
                            out _referralInfoName, 
                            out _referralInfoUri);
        }

        ///  
        /// This function allows the Owner (or a person granted ViewRightsData right)
        /// to extract the original publishing information that was encrypted during publishing process. 
        ///  
        public UnsignedPublishLicense DecryptUnsignedPublishLicense(CryptoProvider cryptoProvider )
        { 
            SecurityHelper.DemandRightsManagementPermission();

            if (cryptoProvider == null)
            { 
                throw new ArgumentNullException("cryptoProvider");
            } 
 
            return cryptoProvider.DecryptPublishLicense(_serializedPublishLicense);
        } 


        /// 
        /// The referral Information provided by the author of the protected content to the consumer. 
        /// This property usually exposes a contact information to ask for additional rights for the
        /// the protected content. 
        ///  
        public string ReferralInfoName
        { 

            get
            {
                SecurityHelper.DemandRightsManagementPermission(); 

                return _referralInfoName; 
            } 
        }
 
        /// 
        /// The referral Information provided by the author of the protected content to the consumer.
        /// This property usually exposes a contact information to ask for additional rights for the
        /// the protected content. Commonly mailto: URIs are used to expose a way to contact the author 
        /// of the content.
        ///  
        public Uri ReferralInfoUri 
        {
 
            get
            {
                SecurityHelper.DemandRightsManagementPermission();
 
                return _referralInfoUri;
            } 
        } 

        ///  
        /// The ContentId is created by the publisher and can be used to match content to UseLicense and PublishLicenses.
        /// 
        public Guid ContentId
        { 
            get
            { 
                SecurityHelper.DemandRightsManagementPermission(); 

                return _contentId; 
            }
        }

        ///  
        /// The Uri that will be used by the AcquireUseLicense call to get the UseLicense.
        ///  
        public Uri UseLicenseAcquisitionUrl 
        {
            get 
            {
                SecurityHelper.DemandRightsManagementPermission();

                return _useLicenseAcquisitionUriFromPublishLicense; 
            }
        } 
 
        /// 
        /// Returns the original XrML string that was used to deserialize the Pubish License 
        /// 
        public override string ToString()
        {
            SecurityHelper.DemandRightsManagementPermission(); 

            return _serializedPublishLicense; 
        } 

        ///  
        ///  This function attempts to acquire a Use License.
        /// 
        public UseLicense AcquireUseLicense(SecureEnvironment secureEnvironment)
        { 
            SecurityHelper.DemandRightsManagementPermission();
 
            if (secureEnvironment == null) 
            {
                throw new ArgumentNullException("secureEnvironment"); 
            }

            // The SecureEnvironment constructor makes sure ClientSession cannot be null.
            // Accordingly suppressing preSharp warning about having to validate ClientSession. 
#pragma warning suppress 6506
            return secureEnvironment.ClientSession.AcquireUseLicense(_serializedPublishLicense, false); 
        } 

        ///  
        ///  This function attempts to acquire a Use License.
        ///  This function suppresses the Windows network authentication dialog box. If the license request is denied
        ///  because the user does not have permission. This function will prevent the network authentication dialog
        ///  box from being displayed. This is useful when attempting to handle license acquisition on a background 
        ///  or other non-user interface thread because you can avoid potentially confusing dialog boxes. If authentication
        ///  does fail, the function will throw an appropriate RightsManagementException 
        ///  
        public UseLicense AcquireUseLicenseNoUI(SecureEnvironment secureEnvironment)
        { 
            SecurityHelper.DemandRightsManagementPermission();

            if (secureEnvironment == null)
            { 
                throw new ArgumentNullException("secureEnvironment");
            } 
 
            // The SecureEnvironment constructor makes sure ClientSession cannot be null.
            // Accordingly suppressing preSharp warning about having to validate ClientSession. 
#pragma warning suppress 6506
            return secureEnvironment.ClientSession.AcquireUseLicense(_serializedPublishLicense, true);
        }
 
        private string _serializedPublishLicense;
        private string _referralInfoName; 
        private Uri _referralInfoUri; 
        private Guid _contentId;
        private Uri _useLicenseAcquisitionUriFromPublishLicense = null; 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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PublishLicense.cs source code in C# .NET

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